| http://www.w3.org/ns/prov#value | - This problem has been solved, according to an important feature of the present invention, by including in the matrix, a trapping agent which is effective to compete with the substrate reagent, in the presence of the peroxidase enzyme, to produce a silent reaction product which is distinguishable from the signal reaction product, with utilization of H2 O2 (FIG. 3).
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